The ruler was invented in the 16th century by William Bedwell, and it is used for drawing straight lines and measuring. Ruler mostly used in math, science and artistic goals with the help of a teacher and tutor.
A ruler, who is sometimes called the rule, or the line gauge also used in geometry, technical drawing, printing, design and construction to measure distances or rule straight lines. The ruler is a straight-edge that can contain calibrated lines for measuring distances.
Download Ruler PNG images transparent gallery.